Valve-spring lifter.



M. W. MELROSE. VALVE SPRING LIFTER.

APPLICATION FILED MAR. 18, 1918.

Patented Apr. 8, 1919.

3 SHEETSSHEET 1.

Fig. 5-

- I L-l M. W. MELROSE,

VALVE SPRING LIFTER.

APPLICATION HLED MAR. 18, 1918.

Patented Apr. 8; 1919.

3 SHEETS-SHEET 2 M. W. MELROSE.

VALVE SPRING LIFTER.

APPLICATION man MAR I8, 1918.

1,299,496. Patented Apr. 8,1919.

3 SHEETS-SHEET 3.

tmrrnn STATES PAT nTosricE.

mmnoox WILLIAM MELROSE, or NORTH B-ELLINGHAM, MASSACHUSETTS.

VALVE-SPRING LIFTER.

T 0 all whom it may concern Be it known that I, MURDooK WILLIAM MnLRosE,a citizen of the United States, residing at North Bellingham, in thecounty of Norfolk and State of Massachusetts,have invented new anduseful Improvements in Valve-Spring Lifters, of which the following is aspecification.

This invention relates to tools for removing from the stem of aninternal combustion engine valve, the stress of the spring whichyieldingly holds said valve to its seat, and thereby permit the removalof the valve when it becomes necessary to grind or clean the same.

The invention is embodied in the improvements hereinafter described andclaimed in a lifter constituting a jack adapted to act in lifting thespring and removing its stress from the valve stem.

Of the accompanying drawings forming a part of this specification,

Figure l is a top plan view of a spring lifter embodying the invention.

Fig. 2 is a side view of the same, and a side view of a portion of theengine.

Fig. 3 is a vertical section of the-spring lifter, and a sectional viewof the portion of the engine shown by'Fig. 2.

Fig. 4 is an end view of the lifter.

Fig. 5 is a section on line 55 of Figs. 2 and 4.

Fig. 6 is a fragmentary view, showing in section one of the standards ofthe base hereinafter described, and in elevation a portion of the lever,said parts being separated.

Fig. 7 is a view similar to Fig. 1, illustrating means for varying thewidth of the lifter.

Fig. 8 is an end view of the lifter shown by Fig. 7.

Fig. 9 is a section on line 9-9 of Fig. 7

Figs. 10 to 13, inclusive, represent a modified construction providingmeans for vertically adjusting the fulcrum members hereinafterdescribed, Fig. 10 being a top plan view, Fig. 11 an end View, Fig. 12 asection on line 1212 of Fig. 10, and Fig. 13 a section on line 1313 ofFig. 11.

Fig. 14 is a'perspective view, representing a non-adjustableembodimentof the invention.

Fig. 15 is a side view of the embodiment shown by Fig. 14, in positionto hold the valve spring lifted.

Specification of Letters Batent.

Application filed March 18, 1918.

Patented Apr. 8, 1919.

Serial No. 223,095.

shown'by said figures are a thrust member adapted to bear on a fixedsupport adjacent to a valve spring 12, shown by Figs. 2 and 3,

the support being portions of the casing 13 of the engine, at oppositesides .of a guide 14: thereon, a lever fulcrumed on said thrust memberand having longer and shorter arms, the shorter arm'being' composed oftwo spaced apart members, and a stirrup pivotally connected to theshorter arm members of the lever, and formed as an abutment, adaptedtobear on the'usualspringsupporting washer 17, which is in turnsupported by a cotter-pin 18, removably inserted in the stem 19 of thevalve 20;

The thrust member includes two spaced apart standards 21, connected by atransverse tie-rod 22, and provided with feet 23 adapted to bear on saidsupport The longer arm of the lever as here shown, includes two spacedapart members 24, connect'ed at theirouter ends by a neck 25 and twospaced apart shorter arm members 26. I desireit understood, however,that the longer arm may be. composed ofa: single member 27 as shown by.Fig. 16. The lever is connected with the standards 21 by fulcrum studs28 between the longer and shorter arms.

I The stirrup member includes a recessed abutment 29, adapted to impartpressure from the lever to the valve spring, through the washer 17, anda pair of spaced apart upstanding ears 30, projecting from opposite endsof the abutment 29 and connected by pivot members 31 with the shorterarmmembers 26.

The stirrup depends from'the shorter arm members and is adapted to swingbetween the same. It is preferably provided-with a positioning stop 32at its central portion, adapted to bear against one or more of the lowerconvolutions of the spring 12, as indicated by Fig. 3, thus positioningthe stirrup relatively to the spring and washer.

The tandards 21 and feet 23 may be made from two strips of metal twistedbelow the tie-rod 22, as indicated by F igfll, and

curved so that their lower ends, which form narrow bearings adapted torock on the support 13, are offset inwardly from the standards 21. Theobject of this arrangement is to enable the feet to bear on the support23 at two points in substantially the S me Vertical plane as the pivotmembers 31,

the'feet 23 and the rod 22 constituting a fork adapted to best ride orreceive the base of the guide 14.

The abutment portion 29 of the stirrup may be placed under the washer17, the feet'23 being at, the same time placed on the support 13. If,now, the longer arm of the the extremities of the feet 23 and the pivots31, so that the jack is adapted to support the spring in a raised orcompressed position, independently of the operator, who may leave thelifter or jack in the position shown by Fig. 15, while removing thecotter-pin and withdrawing the valve from the engine. Owing to the factthat'the'feet 21 are adapted tobear onopposite sides of the guide 14,said guide constitutes a stop preventing the jack from slipping sidewiseor in "a direction at right angles to the plane in which the leverswings.

The foregoing description is applicable to each of the figures of thedrawing, Figs. 1 to 13, inclusive, showing certain structuralfeatures,-providing for various adjustments of the device, as will'benext-described.

As shown byFigs. 1 to 6, inclusive, the standard portions of the thrustmember are ,each composed of a lower member21 and an upper member21,'said members being telescopic and constituting a vertical adjustablestandard, themembers of which may be connected to maintain differentheights of the standard .by transverse pins 33 inserted in orifices inthe members, there being a'plurality of orifices. Each member 21 isprovided with a plurality of open bearings .34, adapted toreceive thefulcrum members 28, said members being preferably trunnions attached tothe lever members. The fulcrum members, therefore, may be located ,atdifferent heights on the standards. The tie-rod 22 connecting the,standards is shown as curved between the standards, to prevent liabilityof its contacting with the guide 14.

The longer arm members may be adjustablein length, as shown-by Figs. 1and 2,

- base standards are screw-threaded rods 21,

on whichcollars 37 are adapted to slide vertically, said collarsbeing'supported by nuts 38 engaged with the threaded standards.

Each collar 37 has a sleeve 39, said sleeves carrying the fulcrummembers 28. By adjusting the nuts 38, the fulcrum members may be raisedand lowered to vary their height.

As shown by Figs. 7, 8, and 9,.provision is made for varying the widthof the lifter or jack. The stirrup member is composed of two slidably ortelescopically connected parts 29 one having a socket 40, and the othera tongue 41 slidable in said socket. The standards which may beconstructed as shown by Figs. 1 to 6, are-connected by a telescopictie-rod composed of bent members 42, one having aright hand, and theother a left hand screw thread, and a turn buckle 43 engaged with saidthreads. The longer lever arm members 24 are connected by a transverseneck, composed of two members 44, one having a right, and the other aleft hand screw-thread, and a turn buckle 45 engaged with said threads.Provision is made. in each embodiment of the invention for minimizingthe liability of slippage of the base feet on the standard 13. To thisend, the'feet may be provided with-downwardly facing teeth orcorrugations 47, as shown by Figs. 14' and 15, or with downwardlyprojecting pins or studs 48, as shown .by Figs. 2 and 4, and by otherfigures. The lower ends of said studs may be concaved or cut to formrelatively sharp edges that engage the support 13.

Either form of the device shown and described is adapted to be folded ina relatively small compass for storage and shipment. H I

The spaced apart offset feet 23 bearing on the support 13 at oppositesides of'the guide 14, enable the operator to correctly position thejack with reference to the spring, the feet being directed by the guidewhen the operator is installing the jack in its operative position.

I claim: 7 1

1. A valve spring lifting jack which comprises a lever having longer andshorter arms, the shorter armincluding two spaced apart members, avalve-spring-engaging stirrup pivoted. to the outer ends of the shorterarm members, fulcrum studs. connected with said lever between theshorter and longer arms thereof,- and a thrust member having bearingssupporting said fulcrum studs, said,.jack being characterized by thefact that the thrust member is composed of two parallel standardscarrying said bearings, transverse connecting means rigidly connectingsaid standards and maintaining the same in spaced relation, and offsetspaced apart feet rigidly connected with the lower ends of the standardsand adapted to bear on a support at opposite sides of a fixed guide inalinement with a valve stem, and engage said guide to position the jackand prevent it from slipping sidewise.

2. A valve spring lifting jack which comprises a lever having longer andshorter arms, the shorter arm including two spaced apart members, avalve-sp'ring-engaging stirrup pivoted to the other ends of the shorterarm members, fulcrum studs connected with said lever between the shorterand longer arms thereof, and a thrust member having bearings supportingsaid fulcrum studs, said jack being characterized by the fact that thethrust member is composed of two parallel standards carrying saidbearings, transverse connecting means rigidly connecting said standardsand maintaining the same in spaced relation, and offset spaced apartfeet rigidly connected with the lower ends of the standards and adaptedto bear on a support at opposite sides of a fixed guide in alinementwith a valve stem, and engage 7 said guide to position the jack andprevent it from slipping sidewise, the said standards being providedwith means for supporting the spaced apart fulcrum studs at differentdistances from the spaced apart feet to enable the jack to cooperatewith valve springs of different lengths.

' 3. A valve spring lifting jack which comprises a lever having longerand shorter arms, the shorter arm including two spaced apart members, avalve-spring-engaging stirrup pivoted to the outer ends of the shorterarm members, fulcrum studs con nected with said lever between theshorter and longer arms thereof, and a thrust member having bearingssupporting said fulcrum studs, said jack being characterized by the factthat the thrust member is composed of two parallel standards carryingsaid bearings, transverse connecting means rigidly connecting saidstandards and maintaining the same in spaced relation, and offset spacedapart feet rigidly connected with the lower ends of the standards andadapted to bear on a support at opposite sides of a fixed guide inalinement with a valve stem, and engage said guide to position the jackand prevent it from slipping sidewise, the said transverse connectingmeans being adjustable to permit a variable spacing of the standards.

In testimony whereof I have affixed my signature.

MURDOCK WILLIAM MELROSE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

